How to change coal-fired hot stove into oil-fired hot stove? How to change ordinary oil-fired hot stove into coal-fired hot stove? In fact, the usual method is to increase the height of the hot blast stove, to transform the cross-section size of the hot blast stove, to expand the volume of the furnace body, to rearrange and adjust the heating surface, to dismantle and transform the original oil-fired hot blast stove, the furnace frame and the foundation, to appraise and evaluate the pressure components of the hot blast stove, and other coal-fired related reformation schemes of the furnace body. The scheme is the same as that of local modification of hot blast stove.
After the overall reform of the oil-fired hot-blast stove, it can not only meet the full load operation of the hot-blast stove, but also keep the installed capacity of the power plant unchanged, give full play to the advantages of the coal-fired power plant, and reduce the power generation cost of the oil-fired hot-blast stove after coal conversion. Improve the economic efficiency of power plant; the integral transformation of hot blast stove can utilize the available components of the original oil-fired hot blast stove equipment (including pressure components, pipes, profiles, steel platforms, girders, steel plates, etc.). The transformation cost of hot blast stove body is lower than the replacement cost of the new hot blast stove scheme. The main problems existing in the overall renovation plan of the hot blast stove are: the large amount of dismantling of the original oil-fired hot blast stove, especially the use of concrete structure to dismantle the furnace frame and pillar, and the large amount of engineering, making it difficult to dismantle the hot blast stove foundation. It is necessary to make a detailed evaluation of the availability of pressure and non-pressure components in the original oil-fired hot blast stove equipment and conduct a special study. Due to the limitation of the original oil-fired hot blast stove equipment and location size, the structure layout and rationality of the pulverized coal stove are affected, and the installation workload and uncertainty factors are increased. The retrofitted hot blast stove is faced with the problem of different service life of old and new equipment, which will have a negative impact on the safe operation in the future. In the new scheme of coal-fired hot-blast stove, in the project of replacing oil-fired hot-blast stove with coal, whether partial or integral transformation, there are some problems in the transformation from original oil-fired hot-blast stove to coal-fired hot-blast stove, whether partial or integral transformation, with the permission of project funds. New coal-fired hot-blast stove can be adopted. Program. The advantages of the new coal-fired scheme are that the transformation scheme is thorough, the full-load operation of the hot blast stove can be guaranteed, and the installed capacity of the power plant remains unchanged.
The new coal-fired hot blast stove ensures the safety and reliability of the hot blast stove, meets the peak shaving requirements, and has high utilization rate of the unit. Gas hot blast stove is a kind of direct combustion of fuel, which forms hot air through high purification treatment, and directly contacts with materials to heat, dry or bake. The fuel consumption of this method is about half that of steam or other indirect heaters. Therefore, without affecting the quality of drying products, direct high purity hot air can be fully used. Through a long period of production practice, people have realized that only by using hot air as medium and carrier, can the heat utilization rate and thermal working effect of oil-fired hot blast stove be improved greatly. Traditional electric heat source and steam heat power are often equipped with multiple circulating fans in the process of conveying, which eventually form hot air for drying or heating operation indirectly. Obviously, there are many shortcomings in this process, such as a large amount of waste of energy, excessive accessory equipment, complex process and so on. The main problems existing in the new scheme of coal-fired hot-blast stove are as follows: the original oil-fired hot-blast stove needs to be completely dismantled and the new coal-fired hot-blast stove needs to be built, which has a large amount of engineering and a long construction period; the huge investment not only requires the total cost of dismantling the original oil-fired hot-blast stove, but also requires the cost of new coal-fired hot-blast stove equipment and manual installation. This is more expensive than the new coal-fired hot blast stove project. The pressure-bearing parts, non-pressure parts, steel parts, parts and pipes of the raw fuel hot blast stove can not be reused.
The original coal-fired hot blast stove was changed into oil-fired hot blast stove, and then coal-fired transformation was carried out. At present, due to historical reasons, the original coal-fired hot blast stoves in some power plants have been replaced by oil-fired stoves. The oil-fired stove of this kind of oil-fired power plant is basically a coal-fired hot blast stove. After coal burning in oil furnace, the structure size and heating surface layout of hot blast stove basically meet the coal combustion requirements. After coal burning in oil stove, the full load output requirements of hot blast stove are guaranteed. The revamping work only needs to restore the characteristics of the original coal-fired hot blast stove. The basic contents and schemes of the revamping project are similar to those of the coal-fired pure oil stove.
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